Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
“A DREDGER IN THE WELL”
From month to month postponed the cleaning of the well from the accumulated in the bottom of a layer of silt. To do this work alone, and even two traditional methods (bucket and spade)...
TRACTOR-UNIVERSAL
This tractor for almost 20 years, and all these years he not only regularly serves his Creator A. A. Safenano from the village of Alexandrov, the Tambov region, but also constantly...
